Try riding your current bike without changing gear (32/16 ish)…see how you get on
It never works. A mixture of mindset and for the first few rides you will try and shift up gears on the flat.
Just throw a conversion kit on a hard tail, half the fun is it’s cheap and simple. Buying a new bike is both expensive and then you go through the inevitable trudge of replacing all the cut corners.
The weight saving isn’t enough to offset the gears, what you do notice is the lack of weight on the rear wheel, it skips uphill over roots.
Sprint uphill, learn to spin on the flats, then recover on the downs.